I'm just going to update my old Joomla 1.5.X to 2.5.X or 3.X. It should also be migrated JoomGallery.

Have made several attempts with various versions of Joomla 2.5.x and 3.x and with corresponding JoomGallery versions.In all cases instead to move/transfer the images 1x1 into the new gallery a copies with new file names have been created (e. g. instead old "Picture_20110709_XXX" the new copy with a name "Picture_20150608_XXX" has been created).

As result of it the images will go lost in search engines, because of new names and new pathways.

Question: What am I doing wrong? How to ensure a 1x1 transfer of images, names and paths?